Frontiers in Forests and Global Change,
Journal Year:
2021,
Volume and Issue:
4
Published: April 23, 2021
Brazilian
mangroves
cover
about
11,100
km
2
and
provide
a
wide
range
of
ecosystem
services.
Despite
their
importance,
they
are
one
the
most
impacted
ecosystems
because
combined
influences
climate
change,
pollution,
direct
conversion
loss.
A
major
driver
environmental
impacts
is
shrimp
farming
this
particularly
acute
in
semi-arid
northeast
Brazil,
where
constrained
narrow
band
along
ephemeral
estuaries
that
often
by
multi-year
droughts.
Recent
changes
to
law,
particular
Forest
Code,
have
weakened
protection
for
associated
“
apicum
”
(salt
pan)
ecosystems.
In
NE
ponds
converted
from
mangrove-adjacent
apicuns
rather
than
themselves
with
periodic
hydrological
connectivity
through
dammed
channels,
allowing
flushing
effluents.
As
result,
main
on
typically
indirect,
pollution
inputs
pond
effluents
loss
services
including
reductions
primary
productivity,
carbon
storage
capacity,
resilience
other
stressors,
efficiency
as
estuarine
filters,
biodiversity
abundance
subsistence
use
marine
species.
Soil
damage
infrastructure
remaining
after
deactivation
impairs
mangrove
recovery.
This
extends
duration
allows
occupation
degraded
areas
activities
can
permanently
impair
function.
review,
we
address
several
aspects
culture
boom
Brazilian,
features
consequences,
future
region
considering
change
rising
poverty.
Our
conclusions
practices
outcomes
likely
apply
similar
settings,
e.g.,
semiarid
regions
worldwide,
Latin
America
Caribbean
region,
our
findings
be
taken
into
account
improve
conservation
management
these
forests
at
least
regional
scale.
Perspectives in Ecology and Conservation,
Journal Year:
2021,
Volume and Issue:
19(3), P. 267 - 278
Published: June 29, 2021
Understanding
the
impacts
on
Brazilian
semi-arid
coast,
which
is
a
drought-prone
area
(>1000
km)
in
tropical
Atlantic,
and
how
ecosystems
survive
adapt
to
such
extreme
environments
requires
socioecological
studies
create
theory
for
conservation.
Here,
we
highlight
five
main
ongoing
changes
areas,
namely
(1)
decrease
rainfall
rates
due
climate
change,
alters
freshwater
flows,
water
residence
times,
promotes
hypersalinity
(>37)
low-inflow
estuaries;
(2)
sea-level
rise,
groundwater
hazards,
increased
erosion
of
beaches
nearshore
mangroves,
landward
mangrove
forest
expansion
enhanced
saline
intrusion
along
river
basins;
(3)
land-ocean
fluxes
silting
closure
sandy
bars
estuarine
mouths;
(4)
warming
intensity
frequency
events
(e.g.,
heat
waves,
droughts,
sea
swells);
(5)
growing
eutrophication
hypoxia,
loss
vegetation
cover
biodiversity
urbanization,
aquaculture
(shrimp
farming),
agriculture,
land-use
includes
building
dams
supply.
The
alteration
biogeochemical
processes
("Arctic
Paradox"
hypothesis)
acidification
that
potentialize
impact
contaminants
nutrients
also
highlighted.
These
have
effects
food
security
multiple
trophic
levels,
should
preferentially
be
studied
through
long-term
approach
advancing
research.
Based
these
concerns,
propose
key
questions
guide
research
context
Decade
Ocean
Science
Sustainable
Development
(2021–2030)
support
science-based
management
actions
Brazil
other
similar
areas
worldwide.
Journal of Hydrology Regional Studies,
Journal Year:
2024,
Volume and Issue:
52, P. 101689 - 101689
Published: Feb. 10, 2024
Semi-arid
regions
are
highly
susceptible
to
drought
due
their
low
annual
precipitation
and
ecological
vulnerability
climate
change.
This
study
focuses
on
the
Niamey
region
in
southwestern
Niger
employs
Vegetation
Health
Index
(VHI)
assess
severity
its
changes.
Using
data
from
Landsat
8
OLI/TIRS,
including
Normalized
Difference
(NDVI)
Land
Surface
Temperature
(LST),
we
derived
Condition
(VCI),
(TCI),
for
2013
2019.
Analysis
of
time
series
2019
reveals
that
experienced
severe
drought,
with
62.31
km2
42.35
km2,
respectively,
facing
a
lack
precipitation.
Notably,
extreme
droughts
covered
large
area
55.75
accounting
13.94
%
region,
indicating
an
increase
frequency
Furthermore,
NDVI
values
ranged
0.50
−
0.18,
while
those
0.57
0.20.
Additionally,
relationship
between
LST
appeared
be
linear
inversely
proportional
both
(R2
=
0.34,
P
0.58)
0.06,
0.25).
Rising
demonstrated
significant
effects
plants,
surface
features
playing
crucial
role.
The
significance
this
research
is
understand
has
impact
agriculture,
water
resources
development.
Remote
sensing
monitor
high
resolution
over
areas
showed
patterns
distribution
during
period
Niamey.
could
provide
valuable
insights
into
land
environmental
planning
tropical
regions.
Ecological Indicators,
Journal Year:
2020,
Volume and Issue:
122, P. 107227 - 107227
Published: Dec. 22, 2020
Coastal
meadows
provide
a
wide
range
of
ecosystem
services
worldwide.
In
order
to
better
target
conservation
efforts
in
these
ecosystems,
it
is
necessary
develop
highly
accurate
models
that
account
for
the
spatial
nature
structure,
processes
and
functions.
this
study,
above-ground
biomass
was
predicted
at
very
high
resolution
nine
study
sites
Estonia.
A
combination
UAV-derived
datasets
were
used
produce
vegetation
indices
micro
topographic
models.
random
forest
algorithm
generate
maps
assess
contribution
each
predictor
variable.
The
model
successfully
accuracies.
Additionally,
grassland
structural
heterogeneity
assessed
using
indices.
results
subsequently
related
management
history
site,
showing
continuous,
monospecific
grazing
tends
simplify
which
could
turn
reduce
supply
key
regulation
maintenance
services:
nursery
reproduction
habitat
waders.
These
also
indicate
UAV-based
surveys
can
serve
as
reliable
monitoring
tools
aid
development
site-specific
strategies.
Land,
Journal Year:
2020,
Volume and Issue:
9(3), P. 90 - 90
Published: March 18, 2020
Drought
and
vegetation
dynamics
in
the
northern
Xinjiang
Uygur
Autonomous
Region
of
China
(NXC),
centre
Asia
with
arid
climate,
were
assessed
using
standardized
precipitation
evapotranspiration
index
(SPEI)
normalized
difference
(NDVI).
Analyses
performed
through
use
Sen’s
method
Spearman’s
correlation
to
investigate
variations
NDVI
impacts
drought
on
from
1998
2015.
The
severity
droughts
NXC
was
by
SPEI,
which
revealed
increase
over
last
60
years
at
a
rate
0.017
per
decade.
This
indicates
that
an
alleviating
tendency
intensity
occurred
NXC.
Specifically,
spatial
pattern
increased
gradually
north-western
south-eastern
regions.
average
yearly
0.28
slightly
0.001
yr−1
(r
=
0.94,
p
3.64)
between
Additionally,
showed
obviously
heterogeneity,
greater
values
west
small
east.
Significantly,
positive
correlations
SPEI
observed,
while
exerted
five-year
lag
effect
vegetation.
